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The generator of AM EMFs consists of a battery-driven radiofrequency (RF) EMF generator connected to a 1.5 m long 50 ? coaxial cable, to the other end of which a stainless-steel spoon-shaped mouthpiece is connected via an impedance transformer. The RF source of the device corresponds to a class C amplifier operating at 27.12 MHz. The carrier frequency is AM with a modulation depth of 85±5%, whereas the modulation frequency is generated by a digital direct synthesiser with a resolution of 10-7. The treatment sequence is controlled by a microcontroller (Atmel AT89S8252, Fribourg, Switzerland), that is, duration of session, sequence of modulation frequencies and duration of each sequence can be programmed via PC over a RS232 interface. The RF output is adjusted to 100 mW into a 50 ? load, which results in an emitting power identical to that of the device used for the treatment of insomnia.
Explain Quantizing Analog Signals? A common analog-to-digital conversion pipeline contains a spectrum limiter (a simple low-pass or bandpass filter), a sample and hold circuit
Explain Resistivity. Resistivity : Resistance R of a wire containing cross-sectional area A and length L maintain the relationship, - R α L and R α 1/A; that is resulting R α
I`m a 3rd year electrical engineering student studying in Canada, and there is a new course they added in my university for 3rd year students called Engineering Project. from the
explain how we can produce static eletricty?
A6KVA,100V/500V single-phase transformer has a secondary terminal voltage of 487.5 volts when loaded. determine the regulation of the transformer
Q. Write short note on a negative clamper ? A circuit which places the negative peak of a signal at a desired level is known as a negative clamper (1). During the
Q. Draw a centralized SPC organization. Ans: A dual processor architecture can be configured to operate in one of three modes: (i) Standby mode (ii) Synchronous dupl
For the motor speci?ed in figure, compute the following: (a) The load component I' 2 of the stator current, the internal torque T, and the internal power P m for a slip of 0.
Question: a). For the circuit shown in figure state which operation is performed and draw the output waveform if measured between points A and B. The input signal is given in f
Q. Explain Demodulation of DSB? Demodulation of DSB SC AM signals requires a synchronous demodulator, which is also known as coherent or synchronous detector. That is, the demo
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